7.
Star Magnitude <ul><li>Absolute magnitude: measure of the amount of light a star actually gives off. </li></ul><ul><li>Apparent magnitude: measure of the amount of a star’s light received on Earth </li></ul>

8.
Space Measurement <ul><li>Astronomers measure a star’s parallax </li></ul><ul><ul><li>The shift in its position when viewed from 2 different angles. </li></ul></ul>